I saw the Neptune Pine making headlines today, I was waiting for smart watch to surface! The Neptune Pine runs Leaf OS (derived from Android) and has a heart rate monitor built-in which is great news!
Recently two athletes lost their lives during a local endurance race... I was pondering the idea of a 3G device to send heart rate updates to www.onms.net which will allow for instant alerts to be generated in case something goes wrong... I'll add a heart rate monitoring feature to the Android app client for this soon!
Essentially a nice spec smart phone can now be on your wrist, check the specs out at: http://www.neptunepine.com/tech-specs.html